When I was a lot younger, there were some shops that used a (I think) security system that emitted a high frequency sound which most people could not hear. I could, and I had to avoid those because it was akin to nails on a chalkboard for me, but did not affect people I shopped with..
Living in Chicago at the time and taking public transportation, I had to block my ears at certain places riding the "el" because the sound emitted at certain turns was excruciating. I am much older and deafer (too many rock concerts) so not bothered. I wonder if something like that could be operating here?
One friend's child is autism spectrum, and fluorescent tube lighting really bothers him, could it be 60 cycle hum/flicker?
Not discounting hypochondria, but just because I can't hear it/feel it doesn't mean it doesn't exist.